Anyone ever cut one open to see how the sidewalls are made?
Just curious lol
When I first got my car you didn't need to cut them open to see how they were made, one was burst and the others weren't far behind so you could see what was inside. Rubber inner, three layers of cords much the same as in a tyre (not surprising considering they are make by Dunlop) arranged at right angles to each other and a top layer of thicker rubber.
Dunlops seem to be made with natural rubber, as Richard says like a tyre construction. Arnotts are thinner and are made of a synthetic rubber.